Subjunctive (doubt/denial)

• dudar - to doubt
• es imposible - it's impossible
• es improbable - it's improbable
• es poco cierto/seguro - it's uncertain
• (no) es posible - it's (not) possible
• (no) es probable - it's not probable
• negar - to deny
• no creer - not to believe
• no es evidente - it's not evident
• no es cierto/seguro - it's not certain
• no es verdad - it's not true
• no estar seguro (de) - not to be sure (of)